Connect two RTrader accounts with Ninjatrader 8 (plug-in mode)

Hello, I have the following problem: I have two r-Trader Pro accounts. Therefore I wanted to start the Rtrader software twice to log in with both accounts. But when I do that I get the error message “Plug-in connect point Historical data (compressed) [127.0.0.1:3012] failed to start. Plug-in connect point for Historical data (plain text) [127.0.0.1:3013] failed to start. Make sure the port is not in use. (create error)” i need the plug-in connection to connect to ninja trader. I would like to have both accounts connected to ninjatrader at the same time. Is it possible somehow?

We do not support NinjaTrader8. You should ask them directly.
We use Rithmic over our platform Optimus Flow.

Matt Z
Optimus Futures